FIRST TIME OUT

[Dave Roy]

CAR: 85 Thunderbird Turbo Coupe

Engine: 440 ci. windsor 4.185 bore x 4.0 stroke 14.3 to 1 comp.
Cylinder head: Yates C3 Intake 355 cfm @ .700 exhaust 262 cfm @ .700
Intake: CHI 3v dominator flange with NOS pro race fogger
rockers: Jesel 1.65 ratio
Cam: 270 @ .050 int. & 276 @ .050 eht. on a 109 lobe sep. intalled on a 111 intake center line .721 lift both intake and exhaust
Carb: 1050 dominator
Transmission: C6 with 4500 stall pro edge on motor
Rear end: 4.10 8.8
Header: 2.0" primary through a 3.0" exhaust borla XR1 mufflers



Motor pass 10.06 @ 136.7 with 1.44 60ft. off the footbrake shifted at 7400

NOS pass 9.32 @ 148.6 with 1.38 60ft. off the footbrake with a WOT switch

NOS jetted with 22 pill on the NOS side and 22 pill on the fuel side

Cars weight is 3400 LBS. with me in it.

All runs where at Lapeer not the best track

Going back out with open headers to see how much the small exhaust is holding it back.

[Monty Mikho]

:smt023

[Dave Roy]

Went back out with open headers, car went 9.98 on motor but was breaking up in highgear. Thought it might be to lean added fuel but the miss started sooner. But the early numbers where better. Think I might have a fuel pump or carb problem.

[Cooperacing]

CAR: 85 Thunderbird Turbo Coupe

Engine: 440 ci. windsor 4.185 bore x 4.0 stroke 14.3 to 1 comp.
Cylinder head: Yates C3 Intake 355 cfm @ .700 exhaust 262 cfm @ .700
Intake: CHI 3v dominator flange with NOS pro race fogger
rockers: Jesel 1.65 ratio
Cam: 270 @ .050 int. & 276 @ .050 eht. on a 109 lobe sep. intalled on a 111 intake center line .721 lift both intake and exhaust
Carb: 1050 dominator
Transmission: C6 with 4500 stall pro edge on motor
Rear end: 4.10 8.8
Header: 2.0" primary through a 3.0" exhaust borla XR1 mufflers



Motor pass 10.06 @ 136.7 with 1.44 60ft. off the footbrake shifted at 7400

NOS pass 9.32 @ 148.6 with 1.38 60ft. off the footbrake with a WOT switch

NOS jetted with 22 pill on the NOS side and 22 pill on the fuel side

Cars weight is 3400 LBS. with me in it.

All runs where at Lapeer not the best track

Going back out with open headers to see how much the small exhaust is holding it back.

Quick question, why didn't you go with the CHI 3V heads?

[Dave Roy]

I got a quote from chi for $3800 for fully cnc ported head. But I found a set of c3 local for $2000 that where ported by Rick Swayne of Livernois Motors. So I thought that these would be a good buy until I had to change the valves and springs to clear my cam. Than I found out the head requires a shaft mount rocker another $1200. My old set of yates that where on the car are from the 80's so I was using crane golds on 7/16 studs with no problems.

Should have went with chi would have been cheaper in the long and just as good.

[Tom McDunnah]

Whats the ignition?
MSD crank trigger?
Whats the spark plugs gapped at?
And what spark plugs are you using?

[Dave Roy]

6al with the piggy back programmer
ngk 8's on the motor and 9's on the hose
gap is @ .035 on both motor and hose

[Tom McDunnah]

6al with the piggy back programmer
ngk 8's on the motor and 9's on the hose
gap is @ .035 on both motor and hose

If you still have a "miss" regap the plugs to .025 to .028 that may be the problem

Don't get me wrong but the 6al might not have the "juice" to fire off the fuel/

Thats what leads me to say this as you had said,you added more fuel and it or the miss got worse.
Look at the ignition box,you might want to go to a digital 7 or a 7al box to cure this miss
thats my .02
Tom

[Dave Roy]

I had a programmable 7 on it but at the time I drove it on the street alittle and burned it up it about 200 miles. So I put the 6al back on. But your right if I reduce the gap the 6al might be able to fire it. I'm may have found the limits of a 6al.